Sand-grading device



Aug. 7, 1928.

FLM. ANDERspN E'r AL SAND GRADING DEVICE4 Filed June 5. 1926 INVENTORS Frank M. Anderson BYClzester 0. Azvzdcnson l @7,04

ATTORNEY.

Patented Aug. 7, 1928.

" i ATES" PATE OFFICE'. Y

FRANK'M.HANDERSON AND CHESTER O. ANDERSON, OF ST. JOSEPH, 'MISSOURI SAND-creanme DEVICE.

i application meaJun 5 192e. serial No. 113,892.y

Our invention relates to a sand grading device, and has for its chiefobject to grade the sand as it is pumped from the riverbed.

A furtherobject of our invention is to kprovide. means" for separating the sand into Vthree or more grades.

A still further ob]ect of our invention A still further object of our invention is to provide a baille distributing means for the aggregate to pass evenly over or through the screens. i

These and other objects will hereinafter be more fully explained.

Referring to the drawings: j v Fig. 1 is a front elevation of the mechanism, parts removed for convenience vof Iillustration. i

Fig.l 2 is a cross section taken on line 2-2 in Fig. 1. y

Fig. 3 is an enlarged detailedffragmentary view of the main chute, parts removed for convenience of illustration.

Fig-4 is a transverse view partly broken away of Fig. 3 showing a rearwardly ex v tending trough and screen. f Fig. 5 is a rear view of Fig. 4. Y The mechanism herein disclosed consists of a pump house 1 vpositioned within a stream. The said'house' has a power means installed therein actuating a pump to raise water and sand through a dredge pipe 2,v

discharging the same through a pipe 3 into the upper extremity of a chute 4. The said chute has a pivotally connected bale plate 5 swinging from the upper edge as at 6, the lower edge stationarily supported by a rod 7 the ends of whichv are adapted to'engage.` in apertures 8 as supporting means for the' desired slant of the plate; said apertures being in the sides of the chute and in an arcuated position, the radius of which is positioned at the pivot point 6.

The object of the bale plate is to discharge the aggregate on a solid portion of the bottom of the ltrough above the series of screens so that the flow of the substance (which is sand and water) is evenly distributed., over the .screened panels hereinafte'rvdescribed'.

' Late'rallyy extendingA from the underside g of thev chute 4 is a chute 9K, the last said chute having sides andl a panel of's'creen 4spaced from the bottom, for the purposev later described. f y

Beneath the chutes and in working relation thereto are a plurality of bins desig- 'nated by numeralsv 10, 11 andlQ. In the bottom and upper end of the chute 4 is a panel of wire screening 13 being of line mesh and in close proximity thereto and in alignment therewith 1s a panel of wire screening .14 of largerA mesh. The said panels are separated by a cross bar 15 as supporting means for the adjacent ends of the screening and connectin means for a laterally extend-- ing chute. T e sidejedges of thel screen are Supported by the sides A of the chute. The

screen 13 being of small mesh will allow the water and the finer portions of the sand to pass therethrough and deposit on a screen 16 of a still smaller mesh which is spaced from the bottom 17 by'a bar'18, as the sand and water passing through the screen 13 pass over the screen 16 in their downward course the water and blow sand 'will pass through the last said screen and be' conveyed from the chute near the lower end thereof by 'means of a ipe 19. The portion of sand passing overt e screen will deposit in the bin 12, which sand is appropriate for wall plaster. That portion of sand that will not pass throughthe screen 13 will pass through .the screen 14 depositing in the bin 11, graded as concrete sand. That portion of the sand that is too large to pass through the screen 14 will deposit in the bin 10 .and is of such size to be called gravel. i

It will be understood that the chutes may be of greater-length to permit the installation rof other screening of diferent. mesh by which means 'other grades of Asand may be had. `In such arrangement other bins will be provided to receive the respective grades.

As the water flows ree-lywith the sand it lnaturally deposits in the different bins;

therefore we have provided lopenings 20 posi- ,tioned near the bottom of each bin so that tension on the upper end thereof in which to pivotally connect a baille plate and means to stationarily place the angle of the plate relative to the longitudinal plane of the chute so that thedischarge from a pumping plant will be spread thereby to equally distribute on the bottom of the chute in its downward travel, a chute laterally extending' from t-he under side ofthe iirst said chute to register with'the upper screened opening, a screening spaced from the bottom of last said chute, a spout registering` between the last said screening and the bottom of the last said chute as conveying means for silt, fine sand or the lilerfrom the graded sand, all as, and for the purpose described.

Y FRANK M. ANDERSON.`

CHESTER O. ANDERSON. 'l 

